Well water doesn't interfere with river water — everyone goes their own way.
Tips
culture
The idiom 井水不犯河水 (jǐngshuǐ bù fàn héshuǐ) — 'well water does not interfere with river water' — means to mind one's own business and not intrude on others' affairs. It is widely used in disputes to say 'I'll stay in my lane if you stay in yours'.
